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As an avid experimenter and paraglider pilot the question of how fast an object reaches terminal velocity has been tested a few times by our fellow pilots.

In fact one 'person' actually hollowed out a cricket ball and installed a miniture vario to record the 'flight curve'.

The ball was re-weighted to allow for the hollowed out section so it was the same as an un holled ball.

Air density was 1013-1011 during the half hour flight.

Altitude dropped from was 2000ft above field.

Max speed came out at a little over 35m/s ( about 80mph).

Interestingly the speed did vary 3 or 4 mph during the terminal velocity period.

We put that down to the ball turning and the seam presenting itself in different angles to the air flow and changing the Cd. (also it was an oldish slightly scuffed ball, so maybe a new polished one may travel a few mph faster)

Thats the closest I get to cricket !

Hope this info is of use to some of the out fielders.

Im off to find another cloud.

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13y ago

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Why is it difficult to calculate the terminal velocity for a cat falling from a high rooftop?

Calculating the terminal velocity for a falling cat is challenging because it involves a complex interplay of factors such as the cat's shape, orientation, and surface area. The cat's movements and aerodynamics during the fall also affect its terminal velocity, making precise calculation difficult. Additionally, ethical considerations prevent conducting experiments that could provide accurate data on this scenario.


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The force of gravity pulling the object downward must be equal to the force of air resistance pushing upward on the object. When these two forces are balanced, the object stops accelerating and reaches terminal velocity, where its speed remains constant.


How does the velocity of a falling object change over time?

The velocity of a falling object increases as it falls due to gravity. However, as it continues to fall, air resistance will cause the object's velocity to eventually reach a terminal velocity where the forces of gravity and air resistance are balanced, resulting in a constant velocity.


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